How to use

GridStringBuilder

in

org.apache.ignite.internal.util

/**
 * @param code Code lines.
 * @param accessor Field or method name.
 * @param args Method arguments.
 */
private void returnFalseIfFailed(Collection<String> code, String accessor, @Nullable String... args) {
  assert code != null;
  assert accessor != null;
  String argsStr = "";
  if (args != null && args.length > 0) {
    for (String arg : args)
      argsStr += arg + ", ";
    argsStr = argsStr.substring(0, argsStr.length() - 2);
  }
  code.add(builder().a("if (!").a(accessor).a("(").a(argsStr).a("))").toString());
  indent++;
  code.add(builder().a("return false;").toString());
  indent--;
}

/**
 * Creates String key used for equality and hashing.
 */
private String createEqualityKey() {
  GridStringBuilder sb = new GridStringBuilder("(").a(usr).a(")@");
  if (uri.getScheme() != null)
    sb.a(uri.getScheme().toLowerCase());
  sb.a("://");
  if (uri.getAuthority() != null)
    sb.a(uri.getAuthority().toLowerCase());
  return sb.toString();
}

  /** {@inheritDoc} */
  @Override public String toString() {
    return new SB("FullPageId [pageId=").appendHex(pageId)
      .a(", effectivePageId=").appendHex(effectivePageId)
      .a(", grpId=").a(grpId).a(']').toString();
  }
}

/** {@inheritDoc} */
@Override protected void printPage(long addr, int pageSize, GridStringBuilder sb) throws IgniteCheckedException {
  sb.a("BPlusIO [\n\tcanGetRow=").a(canGetRow)
    .a(",\n\tleaf=").a(leaf)
    .a(",\n\titemSize=").a(itemSize)
    .a(",\n\tcnt=").a(getCount(addr))
    .a(",\n\tforward=").appendHex(getForward(addr))
    .a(",\n\tremoveId=").appendHex(getRemoveId(addr))
    .a("\n]");
}

/**
 * Prints Synchronizers info to a buffer.
 *
 * @param syncs Synchronizers info.
 * @param sb Buffer.
 */
private static void printSynchronizersInfo(LockInfo[] syncs, GridStringBuilder sb) {
  sb.a("    Locked synchronizers:");
  for (LockInfo info : syncs)
    sb.a(NL).a("        ").a(info);
}

/**
 * Gets a hex string representation of the given long value.
 *
 * @param val Value to convert to string.
 * @return Hex string.
 */
public static String hexLong(long val) {
  return new SB().appendHex(val).toString();
}

/**
 * Dumps stack trace of the thread to the given log at warning level.
 *
 * @param t Thread to be dumped.
 * @param log Logger.
 */
public static void dumpThread(Thread t, @Nullable IgniteLogger log) {
  ThreadMXBean mxBean = ManagementFactory.getThreadMXBean();
  GridStringBuilder sb = new GridStringBuilder();
  printThreadInfo(mxBean.getThreadInfo(t.getId()), sb, Collections.emptySet());
  warn(log, sb.toString());
}

/** {@inheritDoc} */
@Override public GridStringBuilder appendCodePoint(int codePoint) {
  if (lenLimit.overflowed(this)) {
    tail.append(codePoint);
    return this;
  }
  int curLen = length();
  super.appendCodePoint(codePoint);
  return onWrite(curLen);
}

/**
 * Appends given long value as a hex string to this string builder.
 *
 * @param val Value to append.
 * @return This builder for chaining method calls.
 */
public GridStringBuilder appendHex(long val) {
  String hex = Long.toHexString(val);
  int len = hex.length();
  for (int i = 0; i < 16 - len; i++)
    a('0');
  a(hex);
  return this;
}

  /** {@inheritDoc} */
  @Override protected void printPage(long addr, int pageSize, GridStringBuilder sb) throws IgniteCheckedException {
    int cnt = getCount(addr);

    sb.a("PagesListMeta [\n\tnextMetaPageId=").appendHex(getNextMetaPageId(addr))
      .a(",\n\tcount=").a(cnt)
      .a(",\n\tbucketData={");

    Map<Integer, GridLongList> bucketsData = new HashMap<>(cnt);

    getBucketsData(addr, bucketsData);

    for (Map.Entry<Integer, GridLongList> e : bucketsData.entrySet())
      sb.a("\n\t\tbucket=").a(e.getKey()).a(", list=").a(e.getValue());

    sb.a("\n\t}\n]");
  }
}

/**
 * Gets a hex string representation of the given long value.
 *
 * @param val Value to convert to string.
 * @return Hex string.
 */
public static String hexInt(int val) {
  return new SB().appendHex(val).toString();
}

/**
 * Dumps stack trace of the thread to the given log at warning level.
 *
 * @param t Thread to be dumped.
 * @param log Logger.
 */
public static void dumpThread(Thread t, @Nullable IgniteLogger log) {
  ThreadMXBean mxBean = ManagementFactory.getThreadMXBean();
  GridStringBuilder sb = new GridStringBuilder();
  printThreadInfo(mxBean.getThreadInfo(t.getId()), sb, Collections.emptySet());
  warn(log, sb.toString());
}

/** {@inheritDoc} */
@Override public GridStringBuilder appendCodePoint(int codePoint) {
  if (lenLimit.overflowed(this)) {
    tail.append(codePoint);
    return this;
  }
  int curLen = length();
  super.appendCodePoint(codePoint);
  return onWrite(curLen);
}

/**
 * Generate {@code CREATE INDEX} SQL statement for given params.
 * @param fullTblName Fully qualified table name.
 * @param h2Idx H2 index.
 * @param ifNotExists Quietly skip index creation if it exists.
 * @return Statement string.
 */
public static String indexCreateSql(String fullTblName, GridH2IndexBase h2Idx, boolean ifNotExists) {
  boolean spatial = F.eq(SPATIAL_IDX_CLS, h2Idx.getClass().getName());
  GridStringBuilder sb = new SB("CREATE ")
    .a(spatial ? "SPATIAL " : "")
    .a("INDEX ")
    .a(ifNotExists ? "IF NOT EXISTS " : "")
    .a(withQuotes(h2Idx.getName()))
    .a(" ON ")
    .a(fullTblName)
    .a(" (");
  boolean first = true;
  for (IndexColumn col : h2Idx.getIndexColumns()) {
    if (first)
      first = false;
    else
      sb.a(", ");
    sb.a(withQuotes(col.columnName)).a(" ").a(col.sortType == SortOrder.ASCENDING ? "ASC" : "DESC");
  }
  sb.a(')');
  return sb.toString();
}

/**
 * @param ids Ids.
 */
private String composeNodeInfo(final Set<UUID> ids) {
  final GridStringBuilder sb = new GridStringBuilder();
  sb.a("[");
  String delim = "";
  for (UUID id : ids) {
    sb
      .a(delim)
      .a(composeNodeInfo(id));
    delim = ", ";
  }
  sb.a("]");
  return sb.toString();
}

/**
 * Appends given long value as a hex string to this string builder.
 *
 * @param val Value to append.
 * @return This builder for chaining method calls.
 */
public GridStringBuilder appendHex(int val) {
  String hex = Integer.toHexString(val);
  int len = hex.length();
  for (int i = 0; i < 8 - len; i++)
    a('0');
  a(hex);
  return this;
}

/** {@inheritDoc} */
@Override public String toString() {
  return new SB("Tail[").a("pageId=").appendHex(pageId).a(", cnt= ").a(getCount())
    .a(", lvl=" + lvl).a(", sibling=").a(sibling).a("]").toString();
}

  /** {@inheritDoc} */
  @Override protected void printPage(long addr, int pageSize, GridStringBuilder sb) throws IgniteCheckedException {
    sb.a("PagePartitionCounters [\n\tcount=").a(getCount(addr))
      .a(",\n\tlastFlag=").a(getLastFlag(addr))
      .a(",\n\tnextCountersPageId=").appendHex(getNextCountersPageId(addr))
      .a(",\n\tsize={");

    Map<Integer, Long> sizes = new HashMap<>();

    readCacheSizes(addr, sizes);

    for (Map.Entry<Integer, Long> e : sizes.entrySet())
      sb.a("\n\t\t").a(e.getKey()).a("=").a(e.getValue());

    sb.a("\n\t}\n]");
  }
}

/**
 * Returns new file name for the given key. Since fine name is based on the key,
 * the key must be unique. This method converts string key into hexadecimal-based
 * string to avoid conflicts of special characters in file names.
 *
 * @param key Unique checkpoint key.
 * @return Unique checkpoint file name.
 */
private String getUniqueFileName(CharSequence key) {
  assert key != null;
  SB sb = new SB();
  // To be overly safe we'll limit file name size
  // to 128 characters (124 characters name + 4 character extension).
  // We also limit file name to upper case only to avoid surprising
  // behavior between Windows and Unix file systems.
  for (int i = 0; i < key.length() && i < 124; i++)
    sb.a(CODES.charAt(key.charAt(i) % CODES_LEN));
  return sb.a(".gcp").toString();
}

/**
 * @param var Variable name.
 * @param mtd Method name.
 * @param args Method arguments.
 */
private void returnFalseIfReadFailed(String var, String mtd, String setConverter, @Nullable String... args) {
  assert mtd != null;
  String argsStr = "";
  if (args != null && args.length > 0) {
    for (String arg : args)
      argsStr += arg + ", ";
    argsStr = argsStr.substring(0, argsStr.length() - 2);
  }
  if (setConverter.isEmpty())
    read.add(builder().a(var).a(" = ").a(mtd).a("(").a(argsStr).a(");").toString());
  else {
    read.add(builder().a(var).a(" = ").a(setConverter
      .replace("$val$", new SB().a(mtd).a("(").a(argsStr).a(")").toString())).a(";").toString());
  }
  read.add(EMPTY);
  read.add(builder().a("if (!reader.isLastRead())").toString());
  indent++;
  read.add(builder().a("return false;").toString());
  indent--;
}